Outlook Custom CSS
By Program.io
Update, sorry guys it stoped working cause Msfot re-brand and the copilot stuff but now it's back and working
Time on the storeAbout 1 to 3 yearsA rough range, not an exact date
Store users64As shown on the Chrome Web Store
Chrome Web Store ratingNot rated yetNo store ratings yet
Last store update11 Jan 2026Version 3.0, 9 months ago
How Outlook Custom CSS is doing
Outlook Custom CSS has been on the store for roughly one to three years and is in the top half of Functionality & UI by users. Recent activity is steady.
- Time on the store
- About 1 to 3 years
- Place in Functionality & UI
- Top half
- Recent direction
- Steady
A rough range, not an exact date.
By store users, among the Functionality & UI extensions we track.
Moving at about the same pace as the month before.
Members see the exact launch date, growth history and every release
Inside the extension
Product image 1 of 5Reviews
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The maker
Program.io has 5 listings on the store. Updates now and then.
- Listings
- 5
- Combined store users
- ≈315
- Store Featured
- 0
- Updated in the last 90 days
- 0 of 5
- Remove the Gmail upgrade button230 users · updated 19 months ago
- Youtube Minimalista12 users · updated 19 months ago
- Mi Página de Inicio Personalizada5 users · updated 12 months ago
- Mi Tema Personalizado4 users · updated 12 months ago
Combined users can count the same person more than once. See all 5 listings
Ext Watch AI
Should you build in this niche?
One research report for Outlook Custom CSS. Reports come with Plus, Pro and Max.
- Takeaway & demandCited takeaway and search volumes
- Traffic & domainPopularity rank, visits and authority
- Money & pricingPlans and prices from the maker’s site
- ReviewsComplaints and praise, quoted
- Competitors & ranksRank against the closest listings
- Build opportunityWhat to build and how to position it
- Every number shows its source and date
- Ready in a minute or two
- Report and PDF yours for 30 days
